The idea of public works are facing a paradigm shift. In order to revive the scorched earth Japan after the war, and to put it to high economic growth, public works of various infrastructure maintenance were indispensable. In the future, public works will be achieved as a business to boost the economy or to develop various infrastructures. However, from now on, it is time to re-question the public works or the targeted business. Conventional public works are afforestation and flood control, it has been distributed to infrastructure development in the country, such as road maintenance, Gulf fishing port, airport maintenance, housing countermeasures, sewage and environment maintenance, and agricultural infrastructure development, but these public works have also played a role in the forefront that generally destroys the natural environment.
In the 21st century, the proportion of public works with conventional ideas that lead to the deterioration of the natural environment in the recycling society is decreasing. The dole of the Tokushima-Yoshino River and the Shimane-Nakaumi reclamation business were the targets of public works. The re-evaluation system, which will re-evaluate such long-term businesses in the future, and review operations, including the discontinuation of business, would be introduced to other public works projects. Therefore, environmental consideration is being added as one of the evaluation criteria of the evaluation system that should be regarded. Even without seeking an example overseas, Aichi has been repeatedly examined from various perspectives over environmental conservation at the Expo venue.
It is a business content according to the idea of a new conception of public goods (environmental goods) to be asked in the future though it is a business to do the maintenance of the public goods that the public service is literally in the past. Conservation of the natural environment is an important platform for the construction of a recycling-oriented society. When we look at the change of the idea from scrap & build to rebuild, partial revision of the River law, enforcement of the environmental assessment Law, and some amendments of the Ordinance concerning the Conservation of the natural environment of each municipality, conventional public works are no longer accepted. The foundation of Social capital development for the next generation is conservation of the natural environment.
Speaking of traditional public works, such as the development of infrastructure such as road, Bridge, Bay Harbor, fishing port, airport, sewage, housing, park, waste disposal facilities, afforestation, flood control, etc., but the change of the Times In recent years, priority shifts have been given to those contributing to the efficiency of logistics and the development of urban development, community development, and the infrastructure of advanced information and telecommunication societies in response to declining and aging societies.
In 2003, so far, Japan spent $208 billion a year on public works projects such as highways, tunnels, dams and bridges. Construction consumes 40 percent of the government budget.
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